NJU26040-16A

-7-

Ver.2008-03-06

The NJU26040-16A operates default command setting after resetting the NJU26040-16A. In addition, the

NJU26040-16A restricts operation at power on by setting PROC pin and MUTEb pin (Table 8). These pins are input pin.

Table 7

Pin setting

Pin No.

Symbol

Setting

Function

“High”

The NJU26040-16A operates default setting after reset.

28

PROC

“Low”

The NJU26040-16A does not operate after reset. Sending start

command is required for starting operation.

“High”

Master volume is set 0dB after reset.

27

MUTEb

“Low”

Master volume is set mute after reset.

The NJU26040-16A outputs clock pulse through WDC (No.26) pin during normal operation. (Table 9)

Table 8 Watch Dog Clock Output Cycle

WDC Output Cycle (Low/High) Time

100ms

The NJU26040-16A generates a clock pulse through the WDC terminal after resetting the NJU26040-16A. The WDC clock is

useful to check the status of the NJU26040-16A operation. For example, a microcomputer monitors the WDC clock and

checks the status of the NJU26040-16A. When the WDC clock pulse is lost or not normal clock cycle, the NJU26040-16A

does not operate correctly. Then reset the NJU26040-16A and set up the NJU26040-16A again.

Note:

If input and output of an audio signal stop and an audio interface stops, WDC can’t output.

That is because it has controlled based on the signal of an audio interface.